ubuntu12.04 && gnome3 ネットワークアップレットを元に戻す
Restructure the desktop layout
Now lets get back the panels to something that we are familiar with...
Press Alt+Win and right-click the top menu bar - N.B. Win is the Windows Symbol key
Repeat the Alt+Win + Right Click the date and choose Delete to delete the clock.
sudo apt-get install indicator-applet-complete